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How to call TextChanged event of parent page, using javascript from Child Page?

I set value of textbox on a parent page using javascript on child pop up window, but this does not trigger the textchanged event of the parent textbox. I believe it requires postback in order to fire textchanged event. So I did this..
CHILD POPUP
<script type="text/javascript">
function updateParent(val, controlname) {
window.opener.document.getElementById(controlname).value = val;
__doPostBack(document.getElementById(controlname), '');//Added this line
}
</script>
But it is still not working. Even if it does I am afraid it will reopen the pop once again since it will cause postback. Any ideas? Try to keep it simple.

Try this
Javascript on parent window.
<script language="Javascript" type="text/javascript">
function domycallback(controlname,val)
{
document.getElementById(controlname).value = val;
__doPostBack(document.getElementById(controlname), '');
return false;
}
</script>
Javascript on Child window.
window.opener.domycallback();

Document.Ready() is not working after PostBack

I have a page that contains a user control within an update panel. $(document).ready(function() ) { is called and executes the code correctly when the page firsts loads but if the user clicks a button (within the user control), the document.ready() doesn't get called (document.load, onload also don't work)
I have researched this on the net and found similar problems but nothing that can explain why this isn't working. What other causes can there be for document.ready not working?

This will be a problem with partial postback. The DOM isn't reloaded and so the document ready function won't be hit again. You need to assign a partial postback handler in JavaScript like so...
function doSomething() {
//whatever you want to do on partial postback
}
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(doSomething);
The above call to add_endRequest should be placed in the JavaScript which is executed when the page first loads.

Instead of $(document).ready you could use function pageLoad(){}.
It's automatically called by the ScriptManager on a page, even on a postback.

I've run into this a while ago, as El Ronnoco said, it has to go with the DOM not being reloaded. However you can simply change
$(document).ready(function() {
to
Sys.Application.add_load(function() {
This will force it to run on every postback.
You can use function pageLoad() as well, but you can only have one pageLoad function, whereas with Sys.Application.add_load, you can add as many handlers as you wish.

Bestest way is
<asp:UpdatePanel...
<ContentTemplate
<script type="text/javascript">
Sys.Application.add_load(LoadScript);
</script>
you hemla code gose here
</ContentTemplate>
</asp:UpdatePanel>
Javascript function
<script type="text/javascript">
function LoadScript() {
$(document).ready(function() {
//you code gose here
});
}
</script>
or
Its under UpdatePanel than you need to register client script again using
ScriptManager.RegisterClientScript
or
$(document).ready(function() {
// bind your jQuery events here initially
});
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_endRequest(function() {
// re-bind your jQuery events here
loadscript();
});
$(document).ready(loadscript);
function loadscript()
{
//yourcode
}

This is an example that worked for me in the past:
<script>
function MyFunction(){
$("#id").text("TESTING");
}
//Calling MyFunction when document is ready (Page loaded first time)
$(document).ready(MyFunction);
//Calling MyFunction when the page is doing postback (asp.net)
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(MyFunction);
</script>

This code below works nice to solve this problem. As indicated in link posted before (http://encosia.com/document-ready-and-pageload-are-not-the-same/), when you have an asp.NET with updatePanels you shall use function pageLoad(). When you have only one page and in each postback it will be fully reloaded, the $(document).ready() is the right option.
Example using pageLoad:
function pageLoad() {
$(".alteraSoVirgula").keyup(function () {
code here
})
}

I was also facing the same problem but i found the jQuery $(document).ready event handler works when page loads, but after ASP.Net AJAX UpdatePanel Partial PostBack it does not get called. so use Sys.Application.add_load(function(){}); instead of $(document).ready.
This works perfectly for me :)
<script>
Sys.Application.add_load(function() {
//Your code
});
</script>

$(document).ready(function () {
PreRoles();
});
//On UpdatePanel Refresh
var prm = Sys.WebForms.PageRequestManager.getInstance();
if (prm != null) {
prm.add_endRequest(function (sender, e) {
if (sender._postBackSettings.panelsToUpdate != null) {
PreRoles();
}
});
};
function PreRoles() {
// Add codes that should be called on postback
}

Most of the times, this is happening because of the Updatepanle.
Just put postback triggers to the button and it will solve this.

get checkbox click inside updatepanel by jquery

I have an update panel with a runat server div inside,
this div isn't shown in the first load of the page. I used to show it after user input the search key then reload the update panel which contain the div and fill div controls then show it.
I have a CheckBox inside this div tag and I need to get the click event of this check box with jquery
I try to use direct .click or .live but all doesn't work !!
Any help will be appreciated.

Use this code
$(document).ready(function()
{
//This will add one function to be called on every request of the update panel
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
});
function EndRequestHandler()
{
$('#checkboxID').change(function(){
//Your functionality
});
}

You need to introduce javascript into the page to simulate the click event again. Page.RegisterClientScriptBlock or Page.RegisterStartUpScript should do it.
or
place this inside the updatepanel
<script type="text/javascript">
Sys.Application.add_load(your jquery function);
</script>

insert javascript only on page postback

I'm sure this is fairly straightforward but i'm having trouble getting it to work. I want to add a javascript function to my page, but only when the page postsback.
So I have a button that calls some server-side code, and when it is finished and the page is re-loading I want the javascript function to be called.
Thinking about this i guess I could just add a hidden variable and set it when the button is clicked, but i think i'd rather just insert the javascript onto the page when it is loading back.
Is this possible, or even a good way to do it?
Thanks,
Neil
Edit: Okay this is my OnClick method in the C# code.
protected void Save(object sender, EventArgs e)
{
Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", "<script type=\"text/javascript\">alert('hello world');</script>");
EnforcementMatch(false);
EnforcementMatch(true);
ApplicationNotMatch();
ApplicationMatch();
Response.Redirect(Request.Url.ToString());
}
Another Edit: Just realised that the response.redirect at the bottom reloads my page cancelling out the code I put in, duh!

You can use ClientScriptManager.RegisterClientScriptBlock
http://msdn.microsoft.com/en-us/library/btf44dc9.aspx
If you place it on the button click event, you don't have to worry if it's a postback or not.

You know about the IsPostBack function, right?
IsPostBack (MSDN)
if (IsPostBack)
{
ClientScript.RegisterClientScriptBlock()
}

This script will be fired with every single postback from updatepanel
<script type="text/javascript">
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_endRequest(function () {
alert('hello world');
});
</script>

Place it in a separate script block, only to be rendered on postback.
<script type="text/javascript" runat="server" visible="<%#this.IsPostBack %>">
TheCode();
</script>

ASP.NET AJAX suppress onbeforeunload for AJAX requests from updatepanel

I am hooking the window.onbeforeunload event in an aspx page. I need that not to fire if I page a GridView that's in an UpdatePanel on the same page.
I have tried hooking the PageRequestManager's initializeRequest event but this fires too late, i.e. after onbeforeunload. I have also tried checking PageRequestManager.get_isInAsyncPostBack() in my onbeforeunload handler but that returns false too, gah!
I have read this SO thread :
537702
But that doesn't make sense to me other than GridView page links cause an unload whereas buttons in a GridView column do not? Anybody know how to solve this? I'm guessing only way is to attach client-side click handler to all the GridView's page anchors to set some boolean flag, but I'm not sure how to accomplish that in a reliable manner.

Ok JQuery to the rescue!
<script type="text/javascript">
var flag = true;
window.onbeforeunload = beforeUnloading;
var prm = Sys.WebForms.PageRequestManager.getInstance();
prm.add_pageLoaded(initPagers);
function initPagers() {
$(".gridViewPagerStyle").click(function() { flag = false; });
}
function beforeUnloading(){
if(flag)
return "unloading";
flag = true;
}
</script>
:
:
<asp:GridView ... PagerStyle-CssClass="gridViewPagerStyle" ... />
:
:
Set a Css class for all pager links, use that to append javascript click handlers that set a flag when clicked, use flag to avoid onbeforeunload